As usual cant connect to wifi

Hi, So Im having problems connecting my ring chimes to the app. I have 4 pcs 1st gen and 4 pcs 2nd gen. at 1 point all of the 1st gen are working and all the 2nd gen were working too. what happened is that there was a black out which is frequent on where i live and after that they wont connect anymore. so here are the stuff i already tried that didnt work. -i tried to delete them from the app and then add again -i tried to reconnect with the app -i connected to someone elses wifi and then tried to reconnect back at home -i have 2.4ghz router which i also tried and i used all the channels nothing worked. i was so determined to make it work so i tried everything but no luck. -i tried “resting” them for months and trying again but no luck -i tried reinstalling the app -i tried a new phone -i tried a different phone both iphone and android i have alot more smart devices at home. even china brand stuff with no problems. the only device that isnt working is this. the doorbell itself doesnt have any problem. i have 140sqm home with 5 google wifi routers, its pretty much full bar inside the house. the only one with bad signal is the doorbell outside. Any suggestions? getting desperate here. Karl